Is that your site? If so, the scripts need to be scanned for malicious code.
A Trojan removed alert may just be telling you that the site was infected but is not any longer. Norton does something similar and shows a security alert on Google and Bing search results pages, but when I search for that site Norton says it is "untested."
If you are getting the warning on every page, then the hacked code is probably in an included footer file.
If it is not your site, then stay out of it. If it is not your site and not a client's site, then there is nothing that you can do to fix it.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin